Step 1:
The first step to converting 668613.6518557 to a fraction is to re-write 668613.6518557 in the form p/q where p and q are both positive integers. To start with, 668613.6518557 can be written as simply 668613.6518557/1 to technically be written as a fraction.
Step 2:
Next, we will count the number of fractional digits after the decimal point in 668613.6518557, which in this case is 7. For however many digits after the decimal point there are, we will multiply the numerator and denominator of 668613.6518557/1 each by 10 to the power of that many digits. So, in this case, we will multiply the numerator and denominator of 668613.6518557/1 each by 10000000:
Step 3:
Now the last step is to simplify the fraction (if possible) by finding similar factors and cancelling them out, which leads to the following answer for 668613.6518557 as a fraction:
668613/1 / 1